I will create a .deb package for your application. I will do this on Ubuntu and test it so that your application will be installable on Ubuntu and derivatives (it will probably work on Debian too). The application may be free or proprietary. If it is free I will provide a PPA for the package. (PPA is an added bonus and not guaranteed)

I will teach you how you can get the direct download link of practically any video you find on a website and how you can download the video using that link.

I will add a watermark image to any short video (less than 100MB). I will then send you a download link for the video. Once you have downloaded the video, I will delete the video so that the download link no longer works.

I will send you the full URL of any online video (Flash or HTML5). You can then download the video using wget or any download manager.